문제 4

def main():
    num = int(input(" =>  "))
    for n in range(num, 0, -1):
        # 5, 4, 3, 2, 1
        for m in range(n, 0, -1):
            # 54321
            #  4321
            print(m, end="")
        print()

if __name__ == "__main__":
    main()